Secure the device to a wall at a convenient height. To use, pull the retractable tape down to the top of the head and read the measurement. This tool is ideal for use in homes, schools, and clinics, providing a reliable way to monitor growth and height changes over time. Features -Color:White -Material:ABS, Iron -Size:15.00X11.50X3.50cm/5.89X4.52X1.38in -Retractable and versatile: the wallmounted height meter features a retractable design, making it suitable for both children and adults, ensuring it meets diverse needs -High precision: this height measurement tool offers an impressive accuracy , providing precise and dependable height readings -Wallmounted design: the included wall plate allows for secure and spacesaving installation on any wall, keeping the device out of the way -Extended measurement range: with a range of up to , this height meter accommodates a wide variety of users, from young children to tall adults -Simple operation: stand in front of the device, and it will automatically measure your height, making it easy to use for people of all ages Package list: 3 x Height Meter